Apparatus for treating binding materials in the form of powder or grit, to produce dextrine and other adhesives of vegetable origin, as well as for treating other materials



June 18, 1 935.

A. DREYER ETAL APPARATUS FOR TREATING BINDING MATERIALS IN THE FORM OFPOWDER OR GRIT TO'PRODUCE DEXTRINE AND OTHER ADHESIVES 0F VEGETABLEORIGIN AS WELL AS FOR TREATING OTHER MATERIALS Filed Dec. 28, 1932 IADOLF DREVER WILLY KUTZNEH INVENTORS ATTORNEYS Patented June 18, 1935APPARATUS FOR TREATING BINDING MA- TERIALS IN THE FORM OF POWDER R GRIT,T0 PRODUCE DEXTRINE AND QTHER ADHESIVES (19F VEGETABLE ORI- GIN, AS WELLAS FOR TREATING OTHER MATEREALS Adolf Dreyer and Willy Kutzner, Potsdam,Germany; said Kutzner assignor to Fred Kutzner, Halensee, near Berlin,Germany Application December 28, 1932, Serial No. 649,228 In GermanyJanuary 6,1932

This invention relates to improvements in apparatus for treating bindingmaterials in the Claims.

form of powder or grit to produce dextrine and other adhesive substancesmade from vegetable '5 or animal products as well as for treating othermaterials of similar form, or in other words, for preparing dextrine,especially for converting starch to dextrine, and for similar purposes,comprising a container surrounded on all sides by an insulating jacketconsisting of walls arranged in a certain distance from the walls of thecontainer.

When producing binding materials like dextrine and other adhesivesubstances made from vegetable or animal products the components in formof powder or grit are brought into a container, wherein they are mixedby means of suitably arranged paddle works, worm gears or the like.During this process the materials are sprinkled or moistened by apredetermined distinct amount of liquid injected by nozzles or the like.In the known apparatus such as used heretofore it was found,unfortunately, that the operation of the process within the container isdeleteriously influenced by the surrounding air especially in view ofthe pre cipitations of liquid on the inner sides of the container-wallsdue to variations of temperature, the result of which is a disagreeablepasting and smearing of the materials being treated, and thus theproduced binding materials become useless in practice. Also otherdisadvantages, such as the occurrence of crystallization are caused bythe influence of the outside air, and effect a continued damage by lossof material. To avoid these and oth r disadvantages, according to theinvention the container is surrounded on all sides by an insulatingjacket consisting of walls arranged at a certain distance from the wallsof the container and thus creating an airbuffer.

This space so constructed between the contamer-walls and the walls ofthe jacket is preferably used for arranging the gears necessary fordriving the usual mixing means coacting with the bottom of thecontainer, which bottom is preferably trough-shaped.

Another object of the invention is to provide within this jacketsuitable cooling and/or heating means. Such cooling and/or heating meansmay be provided also within the jacket on the bottom and cover parts ofthe container.

A further object of the invention is to make the cover part of thecontainer adjustable in height, preferably by means of screw shafts andnuts, which latter are supported on the frame parts of the container.

With these and other objects in view the present invention consists inthe combination and arrangement of parts, as will be hereinafter morefully described, shown in the accompanying drawing, and particularlypointed out in the appended claims, it being understood that changes inthe form, proportion, size and minor details may be made within thescope of the claims without departing from the spirit or sacrificing anyof the advantages of the invention.

In the drawing forming part thereof Figure 1 is a perspective view of anapparatus embodying a practical form of the invention, some parts beingbroken away.

Figure 2 is a side view, partly in cross section illustrating the mixingmeans coacting with the trough-shaped bottom.

Figure 3 is a front View of the parts of Figure 2.

Throughout the views, the same reference numerals indicate the same orlike parts.

In the practice of our invention, the main portion of the apparatuscomprises a container which is formed by the walls at, the metallicbottom 1) and the cover parts 0.

The apparatus can be built up of acid resistant steel or of wood orsimilar material which must be particularly dry, selected and both freefrom knots and of straight grain.

Round the container walls an insulating jacket d'is'provided by means ofouter walls lc, which are arranged at a predetermined distance from thecontainer walls.

The bottom I), which is preferably troughshaped, is provided with afurther insulating jacket 1, which may be either loosely and removablyplaced adjacent to and below the bottom 1), or made an integral part ofsaid bottom, as shown in Fig. 2, and furthermore the cover part 0 canalso be formed by two walls including an insulating jacket m.

The insulating chambers 11 thus constructed can be used for housing thegears n, which are driven by means of a pulley o mounted in suitablebearings. The gears n are mounted on shafts e transversely arranged atsome distance above the bottom b and also supported in suitablebearings.

These shafts e rotate about horizontal axes and are provided with theusual paddle works p as illustrated in Figures 2 and 3, which howeverare not shown in Figure 1.

The insulating chambers d, f and m moreover can be used for arrangingtherein any cooling and/ or heating means q of known type.

The cover part c together with its insulating jacket m is preferablymade adjustable in height. For this purpose the cover is carried byscrew spindles 9 running in screw nuts provided with hand wheels h andsupported on a part of the frame of the container, e. g. on atransversely mounted beam 1".

The cover is provided in, the usual manner with suitably arrangednozzles l for sprinkling or moistening the charge within the container.When the paddle work is driven at a predetermined rate of rotation thecharge is introduced by any suitable and well known devices and isthoroughly mixed, whereby fresh surfaces are continually exposed. to thejets from the nozzles, which project the liquid upon the charge untilthe highest degree of content is reached, or until all particles aredried, grilled or cooled. The dimensions and the form of the containerare so predetermined that the nozzles, when moistening the charge, donot directly encounter the container-walls.

However, when a batch of material has been fully treated, the charge isdischarged by suitably arranged openings in the container, and may beremoved by means of transporting devices.

Having thus described our invention, what we claim is:

1. Apparatus for treating binding materials in the form of powder orgrit to produce dextrine and other adhesives of vegetable origin as wellas for treating other materials of similar form and for similarpurposes, comprising the combination of a container of substantiallyrectangular form having a bottom formed into a plurality of successiveand parallel troughs, a plurality of mixing means within said container,said means being rotatable about horizontal axes and disposed adjacentsaid troughs and cooperating therewith, exterior walls individuallyspaced a certain distance outside all of the walls of the container andtogether forming an insulating jacket surrounding said container, theinsulating space thus formed within the jacket constituting an airbuffer.

2. Apparatus according to claim 1 provided with cooling and heatingmeans for treating materials in the container, which cooling and heatingmeans are located in the insulating space Within the jacket as well asthe driving gears.

3. Apparatus according to claim 1 provided with a jacket beneath thetroughs of the bottom and heating and cooling means disposed in saidjacket for heating or cooling material on said bottom in said troughs.

4. Apparatus according to claim 1 provided with a vertically adjustablecover disposed between the main walls of the container.

5. Apparatus according to claim 1 provided with a vertically movablecover disposed between the main walls of the container, supports on saidcontainer, and rotatable and vertically disposed screw shafts connectedto said cover and 'adjustably held by means engaging the same upon saidsupports, so that rotation of said shafts will raise or lower said coverin said container.

6. Apparatus according to claim 1 provided with a cover for thecontainer and at least one nozzle in said cover for sprinkling andmoistening materials intended to be treated within said container.

7. Apparatus according to claim 1, provided with a vertically adjustablecover disposed between the main walls of the container, and a wallspaced a certain distance above the cover so as to be adjustabletherewith and forming an insulating jacket upon said cover.

8. Apparatus according to claim 1 provided with a vertically adjustablecover disposed between the main walls of the container, 2, wall spaced acertain distance above the cover so as to be adjustable therewith andforming an insulating jacket upon said cover, and one or more nozzles insaid cover for sprinkling and moistening materials intended to betreated within said container.

9. Apparatus according to claim 1 provided with a vertically adjustablecover disposed between the main walls of the container, a Wall spaced acertain distance above the cover so as to be adjustable therewith andforming an insulating jacket upon said cover, and cooling and heatingmeans disposed in the space formed by said jacket upon said cover forcooling or heating materials in the container below said cover.

10. Apparatus according to claim 1 provided with driving gears for saidmixing means located in said insulating space.

WILLY KUTZNER. ADOLF DREYER.

